Basketball or any sport that you hated back in the day. I played basketball from the 4-5 grade elementary team up until my junior year of high school. The first drill I hated was suicides. You lineup on the baseline and run full speed to the nearest foul line lean over touch the ground and back to the baseline touch the ground and then to half-court touch and back to the baseline then the far foul line touch and back then to the opposite baseline touch and back. The other I hated was a drill where we made 2 lines on the baseline and a Coach in between with a whistle and a ball. He would roll the ball, blow the whistle and you had to sprint and dive, fight with another teammate to grab and control the ball. I ended many of those drills with floor burns to multiple areas elbows knees etc and even dislocated a finger once. Back in the early 80’s though 90 these drills were common place. Let’s here some others.